Low-density Polyethylene tubing is a great economical choice that offers the most value for most general applications. The tubing is lightweight, flexible, and non-toxic. Air Line for the Super Small QED Pump Air-lift development tubing for environmental wells Specialized disposable applications SpecificationsMaterial: Low Density Polyethylene / LLDPEColor: NaturalInside Diameter: .17" or 11/64"Outside Diameter: .25" or 1/4"Wall Thickness: .040"Max Pressure: 205 PSI at 72°FTemp Range: -93°F - 184°FHardness, Shore D: 50Tensile Strength: 1700 PSI